CN106232262B - Single crystal casting mold - Google Patents
Single crystal casting mold Download PDFInfo
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- CN106232262B CN106232262B CN201580021383.3A CN201580021383A CN106232262B CN 106232262 B CN106232262 B CN 106232262B CN 201580021383 A CN201580021383 A CN 201580021383A CN 106232262 B CN106232262 B CN 106232262B
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- crystal grain
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- 239000013078 crystal Substances 0.000 title claims abstract description 50
- 238000005266 casting Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 25
- 229910052751 metal Inorganic materials 0.000 description 24
- 238000007711 solidification Methods 0.000 description 16
- 230000008023 solidification Effects 0.000 description 16
- 238000001816 cooling Methods 0.000 description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001092 metal group alloy Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- -1 is controlling Under Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
- B22D27/045—Directionally solidified castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B21/00—Unidirectional solidification of eutectic materials
- C30B21/02—Unidirectional solidification of eutectic materials by normal casting or gradient freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention relates to single crystal casting field more particularly to a kind of molds (1) for single crystal casting, further relate to manufacture and use the mold.Particularly, mold (1) includes mold cavity (7), which includes the first volume (7a), the second volume (7b) and crystal grain conduit (4).Second volume (7b) is located in the first volume (7a) and communicates therewith, and including at least one horizontal protrusion relative to the first volume (7a).Crystal grain conduit (4) has the lower end (4a) connecting with the first volume (7a), and the upper end (4b) adjacent with the horizontal protrusion of the second volume (7b).Mold (1) further includes the partition member (11) being inserted between the second volume (7b) of mold cavity (7) and the upper end (4b) of crystal grain conduit (4).
Description
Background technique
The present invention relates to casting field, the more particularly, to model of lost pattern casting, further relate to manufacture shell mold method and
The method cast using such as model.
In the following description, term " on ", "lower", "horizontal" and " vertical " are relative to just in the mold of casting metal
Be generally oriented restriction.
So-called " dewaxing " casting or " losing mould " casting are widely known.They are complex-shaped particularly suitable for producing
Metalwork.Therefore, lost pattern casting method is particularly used to manufacture turbine blade.
In lost pattern casting, the first step is usually the material for using fusion temperature relatively low, such as wax or resin manufacture mould
Tool.Mold itself is covered with refractory material, to form mold, especially shell mold formula mold.Material model be emptied or from
Here it is the name origin-of " losing mould " method for mould inside removing-later, molten metal is poured into mold, to fill
The type chamber left after model is emptied or removes in mold.Once mold can be opened or be destroyed to metal cooled and solidified
To regain the metalwork with mold shape.In the present context, term " metal " includes pure metal, and especially golden
Belong to alloy.
It can be single cluster by multiple models couplings, wherein model passes through axis in order to manufacture multiple components simultaneously
It links together, which forms the casting channel for molten metal in a mold.
In all kinds of molds that can be used in lost pattern casting, it is known that so-called " shell " mould is formed in the following manner:
Model or model cluster are immersed in slurry, next dusted with fire sand to the model or cluster that are covered with slurry, from
And shell is formed around model or cluster, then shell is toasted, to make its sintering integrally to reinforce shell.
It is contemplated that continuous several times are impregnated and are dusted, to obtain the shell with adequate thickness before baking.Term " fire resisting
For sand " in the present context for specifying any grain material, the granularity of the grain material is fine enough to production needed for satisfaction
Tolerance, and the temperature of molten metal can be born in the solid state, while can also be merged, thus the shape when being toasted to shell
At single piece.
In order to make Foundry Production component obtain particularly advantageous thermo-mechanical property, it is ensured that it is solidifying that metal receives orientation in a mold
Admittedly being desirable.In the present context, term " directional solidification ", which is meant, converts with molten metal from liquid, is controlling
Under, solid crystals are seeded in molten metal and grow in the molten metal.The purpose of directional solidification is to avoid crystalline substance in component
The negative effect on boundary.Therefore, directional solidification can occur in column, or can be monocrystalline.Directional solidification in each column
It is in same direction to orient all grain boundaries, therefore they cannot facilitate crack propagation.Monocrystalline directional solidification is to ensure that portion
Part is as single crystalline solidification, to eliminate all grain boundaries.
To obtain monocrystalline directional solidification, mold provides " starting " type chamber usually in mold cavity, and it is logical to be somebody's turn to do " starting " type chamber
It crosses selector channel to connect with mold cavity, for example, this is disclosed in French Patent (FRP) FR2734189.When metal in a mold
While solidification, since start type chamber, mold is gradually cooled down, and is seeded in start type chamber so as to cause crystal.Selection is logical
The effect in road is to give priority to single crystal grain first, the crystallization for the crystal grain for followed by enabling single crystal grain sow from start type chamber
Advance towards mold cavity in forward position.
Clumsy shape in mold cavity, which may be constituted directional solidification, to be hindered.Therefore, greater level protrusion (spy is being presented
Be not protrusion corresponding with the platform of turbine blade) mold cavity in, solidification front may stop at suddenly substantially hang down
Histogram advances up, and may advance along projection direction.Suddenly change on this direction can be led in the place close to protrusion
Defect is caused, unwanted crystal grain is particularly resulted in.
In order to avoid the problem, those skilled in the art utilize crystal grain conduit, and the effect of crystal grain conduit is for solidification front
The backup path of horizontal protrusion in mold cavity is provided, and is realized in the case where not swerving.However, brilliant
One of grain conduit is the disadvantage is that it makes mold more be difficult to knock out, and metal material solidification is formed by gold especially in crystal grain conduit
Belong to branch next to need to remove from rough casting, therefore increases complicated and expensive finishing steps.
Summary of the invention
The present invention seeks to make up these defects, proposes a kind of single crystal casting mold, is used to form with larger lateral prominent
The component risen, while also promoting being followed by subsequent processing for rough casting.
In at least one embodiment, which realizes that mold cavity includes: first by the mold with mold cavity
Volume；Second volume, second volume are located in first volume and communicate therewith, and have relative to first volume
At least one horizontal protrusion；And crystal grain conduit, the lower end of the crystal grain conduit are connect with first volume, upper end is adjacent to institute
The horizontal protrusion of the second volume is stated, the mold further includes the second volume for being inserted in the mold cavity and the crystal grain
Partition member between the upper end of conduit.
It is arranged by these, the cooling and solidification of metal material can be prominent towards level by die channel in mold cavity
It rises and advances, the metal material in horizontal protrusion does not contact directly with the material in crystal grain conduit, therefore is easier to crystal grain conduit
The metal branch of formation is separated from the remainder of rough casting.
For the constant advance for ensuring cooling forward position in mold cavity, the width of crystal grain conduit upper end can be with the second volume
Horizontal protrusion is essentially equal.
Particularly, which can be used for manufacturing turbine blade, be applied to stationary guide blades and moving vane.For
This, the first volume of mold cavity can correspond to turbine blade main body, and the second volume of mold cavity can correspond to whirlpool
Turbine blade platform.In the present context, term " turbine " includes that energy shifts between fluid stream and at least one set of blade
Any machine, such as compressor, pump, turbine or at least two combination in them.
In order to promote the directional solidification of molten metal material in mold cavity, mold can have below mold cavity
Ejector half chamber, the start type chamber are connect by selector channel with mold cavity.
The invention further relates to a kind of methods for manufacturing single crystal casting mold, method includes the following steps: manufacture mould
Type, the shape of the model copy mold cavity；The model described in refractory material is to form the mold cavity；And it empties
The mold cavity.
It particularly, can be before coating step by the separation structure in order to be easier to merge partition member in a mold
Part is inserted into model.Particularly, model can be made of fusion temperature lower than the material of the refractory material, such as wax or tree
Rouge, and emptied from mold cavity using so-called " dewaxing " method with liquid.
Particularly, the coating step can execute in the following manner: model be immersed in slurry, with fire sand to mould
Type dusts, to form shell around model, and is sintered to shell so that it is reinforced, to form shell mold.
The present invention also provides a kind of methods using mold, this method comprises: by liquid metal material vacuum pressing and casting to mould
In tool type chamber；Metal material is caused to solidify with oriented approach from mold cavity bottom towards top；And mold is knocked out, including insertion
Partition member between the second volume and crystal grain conduit upper end of mold cavity.In the present context, term " vacuum " should
It is interpreted as the pressure more much lower than atmospheric pressure, especially less than 0.1 Pascal (Pa) to 0.01Pa.It is knocked out in mold
Afterwards, the rough casting formed by metal material solidified in mold cavity can receive additional treatments, exist especially for separation
The metal material branch solidified in crystal grain conduit.
Detailed description of the invention
It is following to the detailed description of the embodiment shown in non-limiting example by reading, it is well understood that this
Invention, and advantages of the present invention will be also more clear.Description is with reference to the following drawings, in which:
Fig. 1 is the skeleton diagram of single crystal casting equipment comprising constitutes the mold of one embodiment of the present invention；
Fig. 2 is the perspective view for manufacturing the model of mold shown in Fig. 1；And
Fig. 3,4 and 5 shows cooling progress and solidification front in the casting method executed in equipment shown in Fig. 1.
Specific embodiment
Fig. 1 illustrates how that carry out gradual cooling to molten metal typically in casting method coagulates to obtain orientation
Gu.
Mold 1 used in this method includes sprue cup 5 and pedestal 6.When mold 1 from heating chamber 3 extract out when, pedestal 6 with
Bottom plate 2 directly contacts.Mold 1 also has mold cavity 7.Multiple mould types can also be arranged with trunking mode in equal dies
Chamber.Mold cavity 7 is connect by feeding-passage 8 with sprue cup 5, and when toppling over molten metal, molten metal passes through feeding-passage
8.Mold cavity 7 is general also to be connect by baffle shape selector channel 9 with the smaller start type chamber 10 in pedestal 6 in bottom.Institute
Show in embodiment, mold cavity 7 has a first volume 7a and the second volume 7b, the second volume 7b be located at the first volume 7a just on
Side simultaneously communicates therewith, while substantially wider in a horizontal plane, to have at least one very aobvious relative to the first volume 7a
The horizontal protrusion of work.More specifically, in the illustrated embodiment, mold 1 is for manufacturing turbine blade.Therefore, the first volume
7a corresponds to blade body, and the second volume 7b corresponds to bucket platform.
Mold cavity 7 also has crystal grain conduit 4, and the lower end 4a of crystal grain conduit 4 is directly connect with the first volume 7a, upper end 4b
The horizontal protrusion of neighbouring second volume 7b.In said embodiment, upper end 4b is wider than the remainder of crystal grain conduit 4, thus
The horizontal protrusion of neighbouring second volume 7b on the entire width L of the second volume 7b.Although adjacent, crystal grain conduit 4 it is upper
End 4b and the second volume 7b is not connected to directly, because they are separated by rod partition member 11.
For example, partition member 11 can be made of ceramic materials.Although in the illustrated embodiment, its form is
Cylindrical bar with circular cross section, but depend on the circumstances, it can be using other cross sections and other general shapes.Bar material
Size and thermal conductivity can choose as in the adjacent water of the upper end 4b of crystal grain conduit 4 and the second volume 7b of mold cavity 7
Good thermo-contact is provided between flat protrusion.
Mold 1 can be manufactured by so-called " dewaxing " method or " losing mould " method.The first step of the method is formed such as Fig. 2 institute
The model 12 shown.It is logical that model 12 is used to form mold cavity 7 and start type chamber 10, selector channel 9, sprue cup 5, and charging
Road 8, they are hollow in mold 1.Model is obtained using low melting material, such as suitable wax or resin.When needing to give birth to
When producing a large amount of components, especially these components can be produced by the way that wax or resin are injected permanent mold.For bolster model 12,
It include by refractory material, such as support rod 20 made of ceramics, support rod 20 that it is corresponding with mold cavity 7 in model 12
Main body and its pedestal (not shown) connection corresponding with start type chamber 10.It, can be in order to which support rod 20 to be fixed on model 12
Using the natural adherency of 12 material of model, or utilize suitable adhesive.Also it can use identical mode for partition member
11 are merged into model 12, positioned at the volume of main body corresponding with the upper end 4b of crystal grain conduit 4 and and adjacent to mold cavity 7
Between the corresponding volume of horizontal protrusion of second volume 7b.
In this embodiment, in order to manufacture mold 1 using non-permanent model 12, model 12 is immersed in slurry, so
It is dusted afterwards with fire sand to it.These dippings and step of dusting can be repeated several times, until forming shell, the shell around model 12
Body is formed by the sand for being impregnated with slurry of ideal thickness.
Next the model 12 of shell coating is heated to melt, and the low melting point material of model 12 is emptied from enclosure interior
Material, while retaining support rod 20 and partition member 11.Next, shell is sintered in the baking procedure of higher temperature,
To reinforce fire sand, mold 1 is consequently formed, support rod 20 and partition member 11 are integrally retained in mold 1.
Metal or metal alloy used in the casting method is poured into mold 1 in fusing by sprue cup 5, and is passed through
Feeding-passage 8 fills start type chamber 10, selector channel 9 and mold cavity 7.Using metal alloy used in the method it
In, particularly including monocrystalline nickel alloy, especially for example: the AM1 and AM3 of SNECMA company；And other alloys, such as C-M group
'sWithGeneral Electric's
N6；The RR2000 and SRR99 of Rolls Royce；And the PWA1480 of Pratt&Whitney, 1484 and 1487.Table 1 is shown
The component of these alloys.
Table 1: monocrystalline nickel alloy component by weight percentage
In casting, as shown in Figure 1, mold 1 is maintained in heating chamber 3.Hereafter, in order to cause molten metal gradually cold
But, along major axis X, from will be supported in heating chamber 3, the mold 1 on cooling movable support member 2 is downward to be proposed.Since mold 1 is logical
The pedestal 6 for crossing it is cooling by supporting element 2, and molten metal starts to solidify in start type chamber 10, and works as mold 1 from heating chamber
It when being proposed gradually downward in 3, is set in mold 1 and spreads substantially vertically up, as shown in figure 3, solidification is with forward position 50
Occur.In the crystal grain for ensure initially to sow in start type chamber 10 by the choker that selector channel 9 and its baffle shapes are formed only
There is one to can continue to extend to mold cavity 7.
As shown in figure 4, in the lower end 4a of crystal grain conduit 4,50 bifurcated of cooled and solidified forward position of metal continues in mold cavity
Advance in 7 the first volume 7a, and advances in crystal grain conduit 4.Therefore, which substantially simultaneously approaches
First volume 7a of mold cavity 7, the interface between the second volume 7b and the upper end 4b of crystal grain conduit 4.Therefore, because crystal grain is led
Heat transfer between the horizontal protrusion of the second volume of the upper end 4b and mold cavity 7 of pipe 4, cooled and solidified forward position 50 can be second
Substantially vertical direction of advance is maintained in volume 7b, as shown in figure 5, seemingly the upper end 4b of crystal grain conduit 4 is actually and mold
Second volume communication of type chamber 7 is the same.In this way it is avoided that in the second volume 7b the direction of advance suddenly change, the suddenly change
Unwanted crystal grain may be generated around the interface between the volume 7a and 7b of mold cavity 7.
Metal is cooling in mold 1 and after solidifying, and can knock out mold, next can be with to discharge metal parts
Metal parts is modified by machining and/or surface treatment method.Pass through the upper end 4b and mold cavity of crystal grain conduit 4
Separation between 7 the second volume 7b, knocking out and handling the finishing of component for mold all become obviously to be more easier, because its
It is enough to break the singular association between metal parts and metal branch corresponding with crystal grain conduit, so that they be separated.
Although with reference to particular implementation, invention has been described, however, it will be apparent that without departing from it is of the invention by
In the case where general range defined by claim, different modifications and variations can be made.In addition, the different implementations being previously mentioned
Each feature of mode can combine in Additional embodiments.Therefore, the description and the appended drawings are construed as illustrative, and
It is not limiting.
Claims (9)
1. a kind of single crystal casting mold (1) comprising:
Mold cavity (7), the mold cavity include:
First volume (7a)；
Second volume (7b), second volume are located on first volume (7a) and communicate therewith, and have relative to described
At least one horizontal protrusion of first volume (7a)；And
Crystal grain conduit (4), the lower end (4a) of the crystal grain conduit are connect with first volume (7a), upper end (4b) neighbouring described the
The horizontal protrusion of two volumes (7b)；
The mold (1) is characterized in that it includes the second volume (7b) for being inserted in the mold cavity (7) and the crystal grain
Partition member (11) between the upper end (4b) of conduit (4).
2. mold (1) as described in claim 1, wherein the width and described second of the upper end (4b) of the crystal grain conduit (4)
The horizontal protrusion of volume (7b) is equal.
3. mold (1) as described in claim 1, wherein the first volume (7a) of the mold cavity (7) corresponds to turbine
The second volume (7b) of blade body, the mold cavity (7) corresponds to turbine blade platform.
4. mold (1) as described in claim 1, which has start type chamber (10) further below in the mold cavity (7),
The start type chamber is connect by selector channel (9) with the mold cavity (7).
5. method of the one kind for manufacturing the single crystal casting mold (1) as described in one of Claims 1-4, this method includes following
Step:
Modeling (12), the shape of the model at least copy mold type chamber (7)；
The model described in refractory material (12) is at least to form the mold cavity (7)；And
At least empty the mold cavity (7).
6. method as claimed in claim 5, wherein the partition member (11) is inserted into the model before coating step
(12) in.
7. method as claimed in claim 5, wherein the model (12) is lower than the material of the refractory material by fusion temperature
It is made, and is emptied from the mold cavity (7) with liquid.
8. method as claimed in claim 5, wherein the coating step executes in the following manner: the model (12) are soaked
Enter in slurry, dusted with fire sand to the model, to form shell around the model (12), and to the shell
Body is sintered so that it is reinforced.
9. the purposes of the single crystal casting mold (1) as described in any one of Claims 1-4, the purposes the following steps are included:
It will be in liquid metal material vacuum pressing and casting to mold cavity (7)；
Solidify metal material from the bottom of the mold cavity (7) towards top with oriented approach；And
Knock out the mold (1), including be inserted in the mold cavity the second volume (7b) and the crystal grain conduit (4) it is upper
Hold the partition member (11) between (4b).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1453693A FR3020292B1 (en) | 2014-04-24 | 2014-04-24 | MOLD FOR MONOCRYSTALLINE FOUNDRY |
| FR1453693 | 2014-04-24 | ||
| PCT/FR2015/051044 WO2015162362A1 (en) | 2014-04-24 | 2015-04-17 | Mould for monocrystalline casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106232262A CN106232262A (en) | 2016-12-14 |
| CN106232262B true CN106232262B (en) | 2019-03-05 |
Family
ID=51210583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580021383.3A Active CN106232262B (en) | 2014-04-24 | 2015-04-17 | Single crystal casting mold |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9744587B2 (en) |
| EP (1) | EP3134219B1 (en) |
| JP (1) | JP6526053B2 (en) |
| CN (1) | CN106232262B (en) |
| FR (1) | FR3020292B1 (en) |
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| WO (1) | WO2015162362A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11130170B2 (en) * | 2018-02-02 | 2021-09-28 | General Electric Company | Integrated casting core-shell structure for making cast component with novel cooling hole architecture |
| DE102019201085A1 (en) * | 2019-01-29 | 2020-07-30 | Siemens Aktiengesellschaft | Manufacturing process for a component with integrated channels |
| CN110405146B (en) * | 2019-08-30 | 2021-02-05 | 中国航发动力股份有限公司 | Device and method for reinforcing die shell of crystal selector |
| CN113042713B (en) * | 2021-02-26 | 2023-05-12 | 贵阳航发精密铸造有限公司 | Seeding structure of large-size or multi-connected single-crystal guide blade and manufacturing device |
| CN115889687B (en) * | 2022-11-09 | 2024-05-17 | 中国航发沈阳黎明航空发动机有限责任公司 | Wax mould combination method for single crystal conjuncted guide vane air inlet edge seeding |
| US12076784B1 (en) | 2023-09-22 | 2024-09-03 | Rtx Corporation | Casting shell with grain selector support |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4940073A (en) * | 1989-07-19 | 1990-07-10 | Pcc Airfoils, Inc. | Mold for casting a single crystal metal article |
| US5404930A (en) * | 1994-01-06 | 1995-04-11 | Pcc Airfoils, Inc. | Method and apparatus for casting an airfoil |
| FR2734189A1 (en) * | 1989-05-24 | 1996-11-22 | Snecma | Compact selector for single crystal growth used esp. for casting single crystal superalloy turbine vane |
| EP1452251A1 (en) * | 2003-02-26 | 2004-09-01 | ROLLS-ROYCE plc | Method and mould for component casting using a directional solidification process |
| EP1894647A1 (en) * | 2006-08-29 | 2008-03-05 | Snecma | Method of producing monocrystalline seeds simultaneously when casting monocrystalline parts |
| EP2092999A1 (en) * | 2008-02-08 | 2009-08-26 | Snecma | Method of manufacturing vanes with directional solidification |
| CN102426622A (en) * | 2011-11-15 | 2012-04-25 | 清华大学 | Self-adaptive variable-speed drawing simulation method for single crystal blade production |
| FR2995807A1 (en) * | 2012-09-25 | 2014-03-28 | Snecma | THERMAL SCREEN CARAPLE MOLD |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09144502A (en) * | 1996-08-02 | 1997-06-03 | Hitachi Ltd | Gas turbine blade and its manufacture and gas turbine |
| US6951239B1 (en) * | 2004-04-15 | 2005-10-04 | United Technologies Corporation | Methods for manufacturing investment casting shells |
| US7762309B2 (en) * | 2007-09-24 | 2010-07-27 | Siemens Energy, Inc. | Integral single crystal/columnar grained component and method of casting the same |
| GB0901663D0 (en) * | 2009-02-04 | 2009-03-11 | Rolls Royce Plc | Casting method |
-
2014
- 2014-04-24 FR FR1453693A patent/FR3020292B1/en active Active
-
2015
- 2015-04-17 US US15/305,576 patent/US9744587B2/en active Active
- 2015-04-17 CN CN201580021383.3A patent/CN106232262B/en active Active
- 2015-04-17 WO PCT/FR2015/051044 patent/WO2015162362A1/en active Application Filing
- 2015-04-17 RU RU2016145919A patent/RU2686163C2/en active
- 2015-04-17 JP JP2016564033A patent/JP6526053B2/en active Active
- 2015-04-17 EP EP15725754.4A patent/EP3134219B1/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2734189A1 (en) * | 1989-05-24 | 1996-11-22 | Snecma | Compact selector for single crystal growth used esp. for casting single crystal superalloy turbine vane |
| US4940073A (en) * | 1989-07-19 | 1990-07-10 | Pcc Airfoils, Inc. | Mold for casting a single crystal metal article |
| US5404930A (en) * | 1994-01-06 | 1995-04-11 | Pcc Airfoils, Inc. | Method and apparatus for casting an airfoil |
| EP1452251A1 (en) * | 2003-02-26 | 2004-09-01 | ROLLS-ROYCE plc | Method and mould for component casting using a directional solidification process |
| EP1894647A1 (en) * | 2006-08-29 | 2008-03-05 | Snecma | Method of producing monocrystalline seeds simultaneously when casting monocrystalline parts |
| EP2092999A1 (en) * | 2008-02-08 | 2009-08-26 | Snecma | Method of manufacturing vanes with directional solidification |
| CN102426622A (en) * | 2011-11-15 | 2012-04-25 | 清华大学 | Self-adaptive variable-speed drawing simulation method for single crystal blade production |
| FR2995807A1 (en) * | 2012-09-25 | 2014-03-28 | Snecma | THERMAL SCREEN CARAPLE MOLD |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106232262A (en) | 2016-12-14 |
| JP6526053B2 (en) | 2019-06-05 |
| US20170043391A1 (en) | 2017-02-16 |
| US9744587B2 (en) | 2017-08-29 |
| EP3134219B1 (en) | 2019-10-02 |
| RU2016145919A (en) | 2018-05-24 |
| RU2016145919A3 (en) | 2018-11-22 |
| EP3134219A1 (en) | 2017-03-01 |
| RU2686163C2 (en) | 2019-04-24 |
| FR3020292A1 (en) | 2015-10-30 |
| JP2017513714A (en) | 2017-06-01 |
| FR3020292B1 (en) | 2016-05-13 |
| WO2015162362A1 (en) | 2015-10-29 |
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